It really depends on how effective the power supply design is in the given peice of gear. (Not necessarily price driven either, I've had power line noise contamination problems show up in audiophile preamps at $5K+.) It also has the capability of lowering the noise floor, video and audio, especially where the contamination is aggressive (read in homes that have extensive lighting control systems, etc.) The bad news is that very few of the products on the market have any impact at all. The things that are cheap and easy to filter are generally handled by the gear already. I have only worked with two effective products, the PS Audio Power Plant and the Seakay LineRover. Neither is a $10 strip.


jcmitch